Unanswered: Infinite Scrolling / Lazy scrolling in ExtJS

Unanswered: Infinite Scrolling / Lazy scrolling in ExtJS

Hi All,
Would like to know, a proper implementation of infinite scrolling for grid component.
Tried out examples after googling, but unable to implement it successfully.
If anyone has implemented it, please share the piece of code, which made it to work.
I did the following to implement it :
1. Create a store, with buffered:true.
2. pageSize:10
3. proxy : memory.
4. leadingBufferzone :5.
5. Create a grid with :
selModel: {
pruneRemoved: false }, verticalScroller:{
variableRowHeight: true },
Basically, I tried to implement the example here :http://docs.sencha.com/ext-js/4-1/#!/example/grid/infinite-scroll.htmlPlease let me know, if i am missing something, to get it working.

Infinite Scrolling

Infinite Scrolling

Hi Scott,
Basically, there was no error to debug. But, infinite scrolling was not being implemented. Since, the entire store data was loaded at once, and an ordinary vertical scrollbar was being enabled.
I was expecting, 10-15 rows of data would be loaded, and then, when I scroll down the grid, again, the next 10-15 rows would be populated dynamically.
What, I think is, since I am using proxy type of store as 'memory', the functionality is breaking. Is that so? Because, it happened the same with pagingtoolbar.
Please help.